The data, downloaded and updated weekly, gets plotted by actual contributions and address locations of contributors. That means you can actually zoom down to street level to see the contributions people in your community are making! Zoom down to a specific area and expand the rolled up data icon to display contributions by street. PoliticalBase.com notes the following: All records are based on $200+ contributions to campaigns except for the 2008 Presidential campaigns, which include sub-$200 transactions as well.Read about how PoliticalBase generates this data here. [via]